Sight-feed lubricator.



F. J. HULL.

SIGHT FEED LUBRIGATOR. APPLICATION IILED JULY 12, 1910.

Patented Apr. 9, 1912.

COLUMBIA PLANOG-RAFH C0,,WASHINGT0N, u. c.

. UNITED STATES PATENT OFFICE.

FOSTER J. HULL, OF NEW YORK, N. Y., ASSIGNOR TO THE THOMAS W. PANGBORNCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

SIGHT-FEED LUBRICATOR.

Specification of Letters Patent.

Patented Apr. 9, 1912 To all whom it may concern:

Be it known that I, FOSTER J. HULL, a citizen of the United States, anda resident of the borough of Brooklyn, city of New York, State of New.York, have invented certain new and useful Improvements in Sight-FeedLubricators, of which the following is a specification.

My invention relates to improvements in sight feed lubricators andcomprises a structure particularly applicable to lubricators to be usedin connection with air driven tools, and the like, though applicable toother uses.

The invention consists in the novel structure hereinafter described andin other features hereinafter described and particularly pointed out inthe appended claims.

The object of my invention is to improve the construction of sight feedlubricators.

I will now proceed to describe my invention with reference to theaccompanying drawings and will then point out the novel features inclaims.

In the drawings: Figure 1 shows a side view of the lubricator andindicates the same as attached to the cylinder of a compressed air tool;Fig. 2 shows a top view of the lubricator; Fig. 3 shows a verticallongitudinal section of the lubricator; and Fig. 4 shows a perspectiveview of one of the two main sections of the lubricator, the other mainsection having been removed.

The lubricator herein described is intended to discharge lubricant, at aregulated rate, intothe working fluid (compressed air,

steam, etc), of a fluid pressure actuated machine, such as an engine,compressed air tool, etc.

The lubricator'comprises two main sections, of which one comprises theinlet duct for the working fluid of the engine ortool, and a throttlevalve for regulating the passage of working fluid to such engine ortool, while" the other section of the lubricator comprises an oilreservoir, a sight feed tube, a regulating valve controlling the flow oflubricant, a mixing chamber,'and other features hereinafter described.Between these two sections of the lubricator there is a screen whichserves the double purpose of spreading out the current of working fluidover a considerable area, and of holding back dust, scale and the like,which may be carried by the working fluid, and is quite likely to becarried by the working fluid when that fluid is compressed air; and thisscreen is so located and arranged that moisture carried by the workingfluid (as is apt to be the case when that working fluid is compressedair) and which may collect upon the screen, will tend to wash down thescreen and so to carry down with it the impurities collecting on thescreen.

In the drawings A and B designate the two sections above referred to,the section A comprising the throttle valve 3, the section B comprisingthe oil reservoir 27, the sight feed tube 21, the regulating valve 22,and other features hereinafter described.

1 designates the pipe for conveying compressed air or other workingfluid to the lubricator.

2 (Fig. 1) designates an air engine or other tool operated by theworking fluid so supplied.

The interior of section A of the lubricator comprises two chambers, 7and 8, connected by a duct 4 controlled by the valve 3; which valve isof the nature of a needle valve, and may be opened or closed by means ofa valve stem 5 and hand wheel 6, in the ordinary manner.

- Between the sections A and B of the lubricator there is a broad andshallow passage 9, communicating with the chamber 8 of section A; and inthis passage 9 is located the screen 17. To make a tight joint betweensections A and B, one of these sections (A in the construction shown) isprovided with a projecting rib 12, and the other section (B in theconstruction shown) is provided with a corresponding rib; the ends andsides of the screen are clamped between the adjacent faces of sections Aand B, these sections being held together by means of bolts 16, and -asuitable gasket. 15 is also provided between sections A and B. By thisconstruction, a tight joint between sections A and B, and around theedges of screen 17 is assured, and at th same timeit is very easy toremove the screen for cleaning or replacement; and for that matter, itis very easy to remove the section A, for repair of the valve, in casethe latter becomes cut, or for any other reason. i

The screen 17, being of large area as compared with the port 4 andchamber 8, allows free passage of theworking fluid through itsapertures, notwithstanding that said screen may be of very fine mesh.The location of this screen in a passage much broader than chamber 8,and directly opposite the mouth 10 of this chamber 8, insures thespreading out of th working fluid over the face of said screen, so thatpractically the entire face of the screen is effective for the screeningof the working fluid.

In the lower part of section B of the lubricator there is a mixingchamber 18, which contracts gradually toward the opening of dischargepipe 30; and with th1s chamber 18 the passage 9 communlcates. The floor19 of this chamber 18 is below the level of the bottom of the screenpassage, 9,- so that oil which may accumulate in this chamber 18 will,ordinarily, be at a lower level than the screen 17, and so will notordinarily reach the screen and be carried up the surface thereof bycapillarity or other similar act-ion. Thereby fouling of the screenthrough union of oil with dust on the screen is obviated.

The oil reservoir 27 is connected with the chamber 18 by means of a tube21, which preferably is of glass or other transparent material, andtherefore is a sight tube. Within this tube 21 there is a removablevalve seat 23; and a needle valve 22 is arranged to coact with said seatto regulate the flow of oil or to stop such flow altogether. In thefront of the member B there is an opening 39, through which this tube 21passes, whereby oil passing down the tube may be seen. Needle valve 22is provided with a stem having a screw-threaded shank 24 and handle 25,whereby said needle valve may be adjusted; and a lock-nut 26 is providedto secure said valve in any position to which it may be adjusted. Theoil reservoir is provided with a filling plug 28, upon the removal ofwhich the oil reservoir may be filled readily; and a duct 31 isprovided, connecting the upper part of this oil reservoir with passage9, so that the pressure in said oil reservoir may be the same as in thepassage 9. In the bottom of the chamber 18 there is a removable cleaningplug 29.

What I claim is 1. A lubricator comprising two sections, one providedwith an inlet connect-ion, the other provided with an oil reservoir,said sections arranged to be secured together and provided with apassage between them, said sections arranged to separate along a linewhich is longitudinal with respect to said passage, and a screen in saidpassage through which fluid admitted through said inlet connection willpass, said second sec tion provided with means for discharging lubricantinto the fluid after its passage through said screen.

2. A lubricator comprising two sections, one provided with an inletconnection, the

other provided with an oil reservoir, said sections arranged to besecured together and provided with a passage between them, said sectionsarranged to separate along a line which is longitudinal with respect tosaid passage, and a screen in said passage and arranged longitudinallytherein, through which fluid admitted through said inlet connection willpass, said second section provided with means for discharging lubricantinto the fluid after its passage through said screen.

3. A lubricator comprising two sections, one provided with an inletconnection, the other provided with an oil reservoir, said sectionsarranged to be secured together and provided with a passage betweenthem, and a screen in said passage clamped at the edges between theadjacent surfaces of said sections, through which screen fluid admittedthrough said inlet connection will pass, said second section providedwith means for discharging lubricant into the fluid after its passagethrough said screen.

4. A lubricator comprising in combination an oil reservoir, a passagefor fluid to receive the lubricant, said passage extending approximatelyvertically along the side of said oil reservoir and thence approximatelyhorizontally beneath said oil reservoir, and a screen in the verticalportion of said passage through which the fluid will pass, beforepassing beneath said oil reservoir, said reservoir provided with meansfor discharging lubricant into the fluid after its passage through saidscreen.

5. Alubricator comprising in combination an oil reservoir, a passage forfluid to receive the lubricant, said passage extending approximatelyvertically along the side of said oil reservoir and thence approximatelyhorizontally beneath said oil reservoir, and a screen in the verticalportion of said passage through which the fluid will pass, beforepassing beneath said oil reservoir, the floor of the horizontal portionof said passage being below the lowest portion of the vertical portionof said passage, said reservoir provided with means for discharginglubricant into the horizontal portion of said passage.

6. A lubricator comprising in combination an oil reservoir, a passagefor fluid to receive the lubricant, said passage extending approximatelyvertically along the side of said oil reservoir and thence approximatelyhorizontally beneath said oil reservoir, and a screen in the verticalportion of said passage through which the fluid will pass, beforepassing beneath said oil reservoir, the floor of the horizontal portionof said passage being below the lowest portion of the vertical portionof said passage, said reservoir provided with means for discharginglubricant into the horizontal portion of said passage, the saidlubricator provided with a corresponding orifice extending from thefloor of the horizontal portion of said passage downward, and meansnormally closing said orifice.

the lubricator further provided with an oil reservoir, and with apassage extending fromthe said chamber substantially downward along theoil reservoir and thence beneath said oil reservoir, and a screen in thevertical portion of said passage through which fluid entering throughsaid admission connection will pass, the vertical portion of saidpassage, containing the said screen, being relatively broad and shallowas compared with said chamber, the said screen located in front of theconnection of said chamber to said passage, said lubricator providedwith means for discharging oil into the portion of the passage beneaththe oil reservoir.

8. Alubricator comprising in combination an oil reservoir, an inletconnection, a chamber beneath the oil reservoir, means for deliveringoil from said reservoir to said chamber, and a substantially verticalpassage connecting said inlet connection with the said chamber beneaththe oil reservoir and containing a substantially vertically arrangedscreen through which fluid will pass in passing from said inletconnection to said chamber beneath the oil reservoir.

9. A lubricator comprising two sections, the one provided with an inletconnection, and with a controlling valve, the other provided with an oilreservoir and with a mixing chamber, and means for delivering oil fromsaid reservoir to said chamber, a passage being provided between saidsections connecting said mixing chamber to a cham ber of the first saidsection located beyond the controlling valve of that section, saidsections arranged to separate along a line which is longitudinal withrespect to said passage, and a screen interposed between the saidcontrolling valve and the mixing chamber.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

FOSTER J. HULL.

Witnesses:

F. F. GRAMPToN, M. A. BUTLER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

